Research in theoretical particle physics will include work on superstring theory, and quantum field theory. Techniques which do not require approximations will primarily be used to explore the structure of both superstring theory and quantum field theory: particularly through the use of symmetry, and via the interplay between superstring theory and quantum field theory. Quantum field theory is the conventional framework for describing elementary particles and their interactions. On the other hand, superstring theory is the exciting candidate for a quantum theory of gravity, which also provides a unified framework for all the fundamental forces. Understanding the complete structure of superstring theory is of central importance in our attempt to answer basic questions about the nature of space-time and gravity.
